Title:
複合プリズムを備えた両面フィルム
Document Type and Number:
Japanese Patent JP6835579
Kind Code:
B2
Abstract:
Dual-sided optical films have extended prisms formed in one major surface, and extended lenslets formed in an opposite major surface. Some or all of the prisms are compound prisms, in which the two inclined surfaces of each compound prism each include a tip portion, a base portion, and an intermediate portion disposed between the tip portion and the base portion, the intermediate and tip portions forming a concave shape and the intermediate and base portions forming a convex shape, or vice versa. When obliquely incident light, e.g. from a light guide, is incident on the prism side of the film, an output beam emerges from the lenslet side of the film. The output beam has an intensity distribution with a sharp left beam edge and a sharp right beam edge, these beam edges having 10%-to-90% transition angles of no more than 7, 6, 5, 4, 3, or 2 degrees.
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Inventors:
Michael Jay Sycola
John A. Wheatley
John A. Wheatley
Application Number:
JP2016505530A
Publication Date:
February 24, 2021
Filing Date:
March 25, 2014
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
International Classes:
G02B5/02; G02B3/00; G02B5/04; G02B30/27
Domestic Patent References:
| JP2013524299A | ||||
| JP2013524298A | ||||
| JP2013517602A | ||||
| JP2013529313A | ||||
| JP2011527818A | ||||
| JP2014515499A | ||||
| JP2010266611A | ||||
| JP200870456A |
Foreign References:
| US20060238874 | ||||
| US20050052750 | ||||
| US20120236403 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Jun Tsuruta
Tomohiro Minamiyama
Yoichi Watanabe
Naori Kota
Masatoshi Takahashi
Shinji Mitsuhashi
Jun Tsuruta
Tomohiro Minamiyama
Yoichi Watanabe
Naori Kota
Masatoshi Takahashi